CN103390174A - Physical education assisting system and method based on human body posture recognition - Google Patents

Physical education assisting system and method based on human body posture recognition Download PDF

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CN103390174A
CN103390174A CN2012101385036A CN201210138503A CN103390174A CN 103390174 A CN103390174 A CN 103390174A CN 2012101385036 A CN2012101385036 A CN 2012101385036A CN 201210138503 A CN201210138503 A CN 201210138503A CN 103390174 A CN103390174 A CN 103390174A
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standard operation
action
human body
image sequence
user
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张琼
彭立焱
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SHENZHEN TOL TECHNOLOGY Co Ltd
Shenzhen Taishan Online Tech Co Ltd
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SHENZHEN TOL TECHNOLOGY Co Ltd
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Abstract

The invention discloses a physical education assisting system and method based on human body posture recognition. The system comprises a depth shooting device, a standard action storage unit, a display terminal, an action comparison unit and a prompting device, wherein the depth shooting device is used for obtaining user action depth image sequences comprising movement action of a user following the demonstration action; the standard action storage unit is used for storing a standard action model and standard action demonstration image sequences corresponding to the standard action model; the display terminal is used for displaying the standard action demonstration image sequences for the user; the action comparison unit is used for comparing the user action depth image sequence at a scheduled time point or time period with the standard action model at the corresponding time point or the time period, and obtaining the difference between the user action and the standard action model; the prompting device is used for outputting action evaluation information or action correction prompting information to a display device according to the difference. According to the physical education assisting system and method, the user does not need to wear a special recognition device, the manufacturing cost of the system is lowered, and the user experience is improved.

Description

Physical education backup system and method based on human body attitude identification
Technical field
The present invention relates to computer vision technique, be specifically related to physical education backup system and method based on human body attitude identification.
Background technology
The traditional sports teaching needs place and coach, is subject to many restrictions such as trainer's economic condition, training venues, training time, is unfavorable for the satisfied target of oneself learning of most of user.Do not have interactively by instructional video study, can not make an appraisal to the action of oneself, can not be corrected timely when stroke defect.Selection is come to matches or is performed video recording and learns by imitation, although the user at any time any environment complete, lack guidance, there is no appraisement system for action, training effect can not meet user's needs.
Wear the human synovial identity device and identify the human synovial identity device by specific device and obtain device and the corresponding method of the auxiliary physical education of human action thereby disclose in prior art to adopt.For example, Chinese patent application CN102243687A discloses a kind of backup system of physical education based on the action recognition technology.This system is by wearing the motion capture module with specific wavelength light source and Inertial Measurement Unit for the user, the measurement result that is gathered simultaneously Inertial Measurement Unit by the described specific wavelength light source of video camera tracking is carried out action recognition to target, reaches the auxiliary purpose of physical education.Again for example, Chinese patent application CN102000430A discloses a kind of computer based dance movement judging method.The method is by at human body, trace point being set, gather trace point when the people carries out dancing in the same time locus not, calculate its proper vector so that whether standard is estimated to moving by trace point is carried out projection in the same time position not.
But, this class, by the teaching auxiliary system of the recognition device that needs human body to wear, needs the user to wear special identification device, although also can realize moving study and the match of simple sports, but can not be used for learning to move changes many sports, and system cost is high.
Meanwhile, the human body attitude recognition technology, as the branch of computer vision treatment technology, is obtaining applying more and more widely.The human body attitude recognition technology is partitioned into the articulation point of the different parts of human body in image by the judgement human body attitude of the digital processing to human body image and identification, for example, and head and trunk etc.
document " Real-Time Human Pose Recognition in Parts from Single Depth Images " .Jamie Shotton, Andrew Fitzgibbon, Mat Cook, Toby Sharp, Mark Finocchio, Richard Moore, Alex Kipman, and Andrew Blake.CVPR, 2011 disclose the recognition methods of the real-time human body attitude part of a kind of depth image, by depth image is processed, the attitude estimation problem of difficulty is converted into simply and has realized separating by the pixel classification problem purpose of obtaining the human joint points coordinate information from depth image.
To sum up, lack at present that to need a kind of cost badly lower, do not need to wear physical education backup system and the method for special recognition device.
Summary of the invention
The object of the present invention is to provide a kind of identification point of need not wearing can obtain human body attitude information and carry out the apparatus and method that physical education is taught.
The invention discloses a kind of physical education backup system based on human body attitude identification, comprising:
Degree of depth camera head, be used for obtaining comprising that the user follows the user action range image sequence of demonstration movement athletic performance;
The standard operation storage unit, be used for storage standards action model and the standard operation exemplary image sequence corresponding with the standard operation model;
Display terminal, be used for showing described standard operation exemplary image sequence to the user;
The action comparing unit, be used for the described user action range image sequence of predetermined point of time or time period is compared with the standard operation model of corresponding time point or time period, obtains the difference of user action and standard operation model;
Suggestion device, be used for correcting information according to described difference to display device output action evaluation information or action.
Wherein, described degree of depth camera head also is used for taking the standard operation of training and obtains the standard operation range image sequence, and,
Described system also comprises:
The standard operation training unit, be used for according to described standard operation range image sequence Criterion action model;
Common camera head, be used for obtaining standard operation exemplary image sequence, and described standard operation exemplary image sequence is used for moving to user's exemplary criteria;
Wherein, describedly according to described standard operation range image sequence Criterion action model, comprise:
The volume coordinate of calculating the human joint points of every frame standard operation depth image forms human body attitude information;
Calculate the kinematic parameter of human joint points according to the human body attitude information of continuous multiple frames standard operation depth image; Wherein, described kinematic parameter comprises articulation point movement velocity that the displacement according to time interval of consecutive frame and corresponding articulation point calculates and the rotational angle of human body limb;
The human body attitude information of described human joint points and kinematic parameter and image sequence temporal information are shone upon one by one and obtained the standard operation model.
Wherein, described the described user action range image sequence of predetermined point of time or time period is compared with the standard operation model of corresponding time point or time period, the difference of obtaining user action and standard operation model comprises:
Calculating every framed user in predetermined point of time or time period moves the volume coordinate of human joint points of depth image and forms human body attitude information;
Calculate the kinematic parameter of human joint points according to the human body attitude information of continuous multiple frames user action depth image; Wherein, described kinematic parameter comprises articulation point movement velocity that the displacement according to time interval of consecutive frame and corresponding articulation point calculates and the rotational angle of human body limb;
The human body attitude information of described human joint points and kinematic parameter are compared and obtain difference with the standard operation model of corresponding time point or time period.
Wherein, described system also comprises sound prompt device, and described suggestion device output points out the user to correct action by voice signal.
Wherein, described predetermined point of time is the time point of crucial posture, and described predetermined amount of time is the residing time period of key operations.
The invention also discloses a kind of physical education householder method based on human body attitude identification, comprising:
Playing standard action modeling image sequence, follow the user action range image sequence of described standard operation exemplary image sequence motion simultaneously by degree of depth camera head Real-time Obtaining user;
The described user action range image sequence of predetermined point of time or time period is compared with the standard operation model of corresponding time point or time period, obtain the difference of user action and standard operation model;
Estimate user action or provide action according to described difference and correct prompting.
Preferably, described method also comprises:
Obtain respectively standard operation range image sequence and standard operation exemplary image sequence by degree of depth camera head and common camera head;
According to described standard operation range image sequence Criterion action model.
The present invention can significantly improve the efficiency of user learning sports, teach through lively activities, enjoy enjoyment in physical culture by voice and video, the distinctive interactive performance of the present invention allows the learner enjoy the experience of training training mate as specialty, can offer the more accurately action of standard of learner, study property and recreational having concurrently.Simultaneously, owing to not needing the special apparatus such as wear markers point, the present invention has reduced system cost and has promoted simultaneously user's experience.
Description of drawings
Fig. 1 is the system chart of the physical education backup system of first embodiment of the invention;
Fig. 2 is the system chart of the physical education backup system of second embodiment of the invention;
Fig. 3 obtains the schematic diagram of the articulation point of expression human body attitude according to depth image in the embodiment of the present invention;
Fig. 4 is the method flow diagram of the physical education householder method of the embodiment of the present invention.
Embodiment
Further illustrate technical scheme of the present invention below in conjunction with accompanying drawing and by embodiment.
Fig. 1 is the system chart of the physical education backup system of first embodiment of the invention.
As shown in Figure 1, the physical education backup system of the present embodiment comprises: degree of depth camera head 101(Depth Camera, also referred to as the 3D camera head, therefore can obtain the range information that comprises the object distance camera head, can obtain based on this three dimensional space coordinate of shot object), standard operation storage unit 102, action comparing unit 103, suggestion device 105 and display device 104.
Wherein, described degree of depth camera head 101 is used for obtaining comprising that the user follows the user action range image sequence of demonstration movement athletic performance.The user action range image sequence is used for and the standard operation model compares to obtain difference between user action and standard operation.
102 storages of described standard operation storage unit are made in advance is used for moving the comparative standard action model and being used for being shown to the user doing the standard operation exemplary image sequence of demonstration use.Described standard operation action model can obtain the standard operation range image sequence and further image sequence be trained acquisition by taking standard operation.Described standard operation storage unit 102 provides described standard operation model to action comparing unit 103, to display device 105, provides standard operation exemplary image sequence to follow and learn for the user.
In the present embodiment, standard operation storage unit 102 can adopt existing all kinds of memory storage, as ROM (read-only memory), readable and writable memory, hard disk, flash memory, CD etc., the relevant criterion action data burning that will make in advance/store in the standard operation storage unit gets final product.
Action comparing unit 103 is used for the described user action range image sequence of predetermined point of time or time period is resolved to user's attitude information, user's attitude information is compared with the standard operation model of corresponding time point or time period, obtain the difference of user action and standard operation model.Described predetermined point of time or time period are the crucial posture time point of living in of prior appointment and the time period of key operations, for example, and the important action of the poise of human body and setting-up exercises to radio music when setting-up exercises to radio music start.Action comparing unit 103 only carries out model relatively to this key posture and key operations, to obtain difference, and further by suggestion device, is estimated and is corrected.The difference of obtaining comprises the distance between the articulation point of obtaining user's attitude information and standard operation model, the difference of limb rotation angle and articulation point movement velocity.
Suggestion device 104 is used for estimating user action or providing action according to described difference correcting prompting.Suggestion device 106 is according to the articulation point distance of user's attitude information and standard operation model, the differences such as limb rotation angle and articulation point movement velocity are pressed predetermined evaluation criterion to the user action evaluation, can also provide the prompting of correcting action according to described difference, suggestion device 106 outputs to the display device demonstration with evaluation information or information.For example, posture for open and flat arm in setting-up exercises to radio music, the difference of the action user action image that obtains of comparing unit 105 and standard operation model is that the coordinate of human body hand joint point and ancon articulation point is lower than the corresponding coordinate in the standard operation model, judge that user's arm is on the low side, suggestion device 106 prompting user arms should be raised., in order to overcome the different problem of buman body type, can carry out normalization by the coordinate for articulation point when obtaining human body attitude information.
Display device 105 is used for showing described standard operation exemplary image sequence to the user.
Fig. 2 is the system chart of the physical education backup system of second embodiment of the invention.The second embodiment of the present invention has increased common camera head on first embodiment basis and thereby the standard operation training unit makes described teaching auxiliary system possess the function of production standard action data.
As shown in Figure 2, the physical education backup system of the present embodiment comprises: degree of depth camera head 201, common camera head 202(two-dimensional camera device, can obtain the two dimensional image with half-tone information or chromatic information), display device 203, standard operation training unit 204, action comparing unit 205, suggestion device 206 and standard operation storage unit 207.
Wherein, degree of depth camera head 201 is used for obtaining the standard operation range image sequence and comprising that the user follows the user action range image sequence of demonstration movement athletic performance.The standard operation that the standard operation range image sequence is trained by shooting is recorded, and is used for obtaining the standard operation model for the training of standard operation training unit.The user action range image sequence is used for and the standard operation model compares to obtain difference between user action and standard operation.
Common camera head 202 is synchronizeed the standard operation of taking the coach and is obtained standard operation exemplary image sequence with above-mentioned degree of depth camera head 201, described standard operation exemplary image sequence is used for moving to user's exemplary criteria.
Display device 203 is used for showing described standard operation exemplary image sequence to the user.
Standard operation training unit 204 is used for according to described standard operation range image sequence Criterion action model.
Wherein, the flow process of Criterion action model comprises, the volume coordinate formation human body attitude information of the human joint points of the standard operation training unit 204 every frame standard operation depth images of calculating; Calculate the kinematic parameter of human joint points according to the human body attitude information of continuous multiple frames standard operation depth image; The human body attitude information of described human joint points and kinematic parameter and image sequence temporal information are shone upon one by one and obtained the standard operation model.
Fig. 3 extracts human joint points to represent the schematic diagram of human body attitude from the human body depth image.As shown in Figure 3, utilize a series of human joint points namely can represent the attitude of human body.Utilize the coordinate of described a series of articulation point can form human body attitude information.
Static posture utilizes the single frames depth image namely can build.And, for dynamic action, movement decomposition can be become several attitudes, the spatial variations of different attitudes ShiShimonoseki node can reflect execution, according to the variation characteristic of different articulation point three-dimensional informations during action, sets up the model that comprises motion characteristic.In the present embodiment, calculate the kinematic parameter of human joint points according to the human body attitude information of the standard operation depth image of continuous multiple frames.Kinematic parameter can comprise the speed of articulation point motion and the angle that human body limb rotates.The distance that in the interval time that described speed can be by consecutive frame and the image of consecutive frame, key point moves is calculated, and the angle that human body limb rotates can calculate by the line segment angle that represents limbs that articulation point forms.
Take setting-up exercises to radio music as example, for the action that raises up of the arm in setting-up exercises to radio music, standard operation training unit 104 obtains the human body attitude information of each two field picture according to the multiple image that whole arm raises up during action, by continuous human body attitude information, calculate position, translational speed and all limb angle of human joint points corresponding in each frame, then these information and corresponding temporal information are shone upon and form the standard operation model, this standard operation model comprises the raise up Changing Pattern of the articulation point that arm is corresponding in action of arm.
Action comparing unit 205 is used for the described user action range image sequence of predetermined point of time or time period is resolved to user's attitude information, user's attitude information is compared with the standard operation model of corresponding time point or time period, obtain the difference of user action and standard operation model.Described predetermined point of time or time period are the crucial posture time point of living in of prior appointment and the time period of key operations, for example, and the important action of the poise of human body and setting-up exercises to radio music when setting-up exercises to radio music start.Action comparing unit 105 only carries out model relatively to this key posture and key operations, to obtain difference, and further by suggestion device, is estimated and is corrected.The difference of obtaining comprises the articulation point distance of obtaining user's attitude information and standard operation model, the difference of action rotational angle and articulation point movement velocity.
Suggestion device 206 is used for estimating user action or providing action according to described difference correcting prompting.Suggestion device 206 is according to the articulation point distance of user's attitude information and standard operation model, the differences such as action rotational angle and articulation point movement velocity are pressed predetermined evaluation criterion to the user action evaluation, can also provide the prompting of correcting action according to described difference, suggestion device 206 outputs to the display device demonstration with evaluation information or information.For example, posture for open and flat arm in setting-up exercises to radio music, the difference of the action user action image that obtains of comparing unit 205 and standard operation model is that the coordinate of human body hand joint point and ancon articulation point is lower than the corresponding coordinate in the standard operation model, judge that user's arm is on the low side, suggestion device 206 prompting user arms should be raised., in order to overcome the different problem of buman body type, can carry out normalization by the coordinate for articulation point when obtaining human body attitude information.
Standard operation storage unit 207 is used for the standard operation model of storage standards action training unit 204 acquisitions and the standard operation exemplary image sequence of being obtained by common camera head 202.
In another embodiment of the present invention, the physical education backup system of identifying based on human body attitude can also comprise audio output device, and described suggestion device 206 outputs to audio output device with evaluation information or information with voice mode simultaneously.
Simultaneously, because the user follows demonstration movement carrying out, user action has certain hysteresis than standard operation on the time, when system is processed each action of user, can allow the regular hour departure, while with maintenance, comparing, user and coach's audio video synchronization.
Fig. 4 is the method flow diagram of the physical education householder method of the embodiment of the present invention.As shown in Figure 4, described method comprises:
Step 401, broadcast be the standard operation exemplary image sequence of making in advance, follows simultaneously the user action range image sequence of described standard operation exemplary image sequence motion by degree of depth camera head Real-time Obtaining user;
Step 402, the described user action range image sequence of predetermined point of time or time period is compared with the standard operation model of corresponding time point or time period, obtain the difference of user action and standard operation model;
Step 403, estimate user action or provide action according to described difference and correct prompting.
Wherein, step 402 further comprises:
402A, calculate every framed user in predetermined point of time or time period and move the volume coordinate of human joint points of depth image and form human body attitude information;
402B, calculate the kinematic parameter of human joint points according to the human body attitude information of continuous multiple frames user action depth image; Wherein, described kinematic parameter comprises articulation point movement velocity that the displacement according to time interval of consecutive frame and corresponding articulation point calculates and the rotational angle of human body limb;
402C, the human body attitude information of described human joint points and kinematic parameter are compared and obtain difference with the standard operation model of corresponding time point or time period.
Wherein, also can comprise before step 401 and make the step of obtaining standard operation exemplary image sequence and obtaining the standard operation model, specifically comprise:
400A, obtain standard operation range image sequence and standard operation exemplary image sequence respectively.
400B, according to described standard operation range image sequence Criterion action model.
Wherein, described step 400B further comprises:
The volume coordinate of the human joint points of step 400B1, the every frame standard operation depth image of calculating forms human body attitude information;
Step 400B2, calculate the kinematic parameter of human joint points according to the human body attitude information of continuous multiple frames standard operation depth image;
Step 400B3, the human body attitude information of described human joint points and kinematic parameter and image sequence temporal information are shone upon one by one and obtained the standard operation model.
The present invention can significantly improve the efficiency of user learning sports, teach through lively activities, enjoy enjoyment in physical culture by voice and video, the distinctive interactive performance of the present invention allows the learner enjoy the experience of training training mate as specialty, can offer the more accurately action of standard of learner, study property and recreational having concurrently.Simultaneously, owing to not needing the special apparatus such as wear markers point, the present invention has reduced system cost and has promoted simultaneously user's experience.
obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can realize with the executable program code of computer installation, thereby they can be stored in memory storage and be carried out by calculation element, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step being made into the single integrated circuit module realizes.Like this, the present invention is not restricted to the combination of any specific hardware and software.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, to those skilled in the art, the present invention can have various changes and variation.All any modifications of doing, be equal to replacement, improvement etc., within protection scope of the present invention all should be included within spirit of the present invention and principle.

Claims (12)

1. physical education backup system based on human body attitude identification comprises:
Degree of depth camera head, be used for obtaining comprising that the user follows the user action range image sequence of demonstration movement athletic performance;
The standard operation storage unit, be used for storage standards action model and the standard operation exemplary image sequence corresponding with the standard operation model;
Display terminal, be used for showing described standard operation exemplary image sequence to the user;
The action comparing unit, be used for the described user action range image sequence of predetermined point of time or time period is compared with the standard operation model of corresponding time point or time period, obtains the difference of user action and standard operation model;
Suggestion device, be used for correcting information according to described difference to display device output action evaluation information or action.
2. the physical education backup system based on human body attitude identification as claimed in claim 1, is characterized in that, described degree of depth camera head also is used for taking the standard operation of training and obtains the standard operation range image sequence, and,
Described system also comprises:
The standard operation training unit, be used for according to described standard operation range image sequence Criterion action model;
Common camera head, be used for obtaining standard operation exemplary image sequence, and described standard operation exemplary image sequence is used for moving to user's exemplary criteria.
3. the physical education backup system based on human body attitude identification as claimed in claim 2, is characterized in that, describedly according to described standard operation range image sequence Criterion action model, comprises:
The volume coordinate of calculating the human joint points of every frame standard operation depth image forms human body attitude information;
Calculate the kinematic parameter of human joint points according to the human body attitude information of continuous multiple frames standard operation depth image; Wherein, described kinematic parameter comprises articulation point movement velocity that the displacement according to time interval of consecutive frame and corresponding articulation point calculates and the rotational angle of human body limb;
The human body attitude information of described human joint points and kinematic parameter and image sequence temporal information are shone upon one by one and obtained the standard operation model.
4. the physical education backup system based on human body attitude identification as claimed in claim 3, it is characterized in that, described the described user action range image sequence of predetermined point of time or time period is compared with the standard operation model of corresponding time point or time period, the difference of obtaining user action and standard operation model comprises:
Calculating every framed user in predetermined point of time or time period moves the volume coordinate of human joint points of depth image and forms human body attitude information;
Calculate the kinematic parameter of human joint points according to the human body attitude information of continuous multiple frames user action depth image; Wherein, described kinematic parameter comprises articulation point movement velocity that the displacement according to time interval of consecutive frame and corresponding articulation point calculates and the rotational angle of human body limb;
The human body attitude information of described human joint points and kinematic parameter are compared and obtain difference with the standard operation model of corresponding time point or time period.
5. the physical education backup system based on human body attitude identification as claimed in claim 1, is characterized in that, described system also comprises sound prompt device, and described suggestion device output points out the user to correct action by voice signal.
6. the physical education backup system based on human body attitude identification as claimed in claim 1, is characterized in that, described predetermined point of time is the time point of crucial posture, and described predetermined amount of time is the residing time period of key operations.
7. physical education householder method based on human body attitude identification comprises:
Playing standard action modeling image sequence, follow the user action range image sequence of described standard operation exemplary image sequence motion simultaneously by degree of depth camera head Real-time Obtaining user;
The described user action range image sequence of predetermined point of time or time period is compared with the standard operation model of corresponding time point or time period, obtain the difference of user action and standard operation model;
Estimate user action or provide action according to described difference and correct prompting.
8. the physical education householder method based on human body attitude identification as claimed in claim 7, is characterized in that, described method also comprises:
Obtain respectively standard operation range image sequence and standard operation exemplary image sequence by degree of depth camera head and common camera head;
According to described standard operation range image sequence Criterion action model.
9. the physical education householder method based on human body attitude identification as claimed in claim 8, is characterized in that, describedly according to described standard operation range image sequence Criterion action model, comprises:
The volume coordinate of calculating the human joint points of every frame standard operation depth image forms human body attitude information;
Calculate the kinematic parameter of human joint points according to the human body attitude information of continuous multiple frames standard operation depth image; Described kinematic parameter comprises articulation point movement velocity that the displacement according to the time interval of consecutive frame and corresponding articulation point calculates and the rotational angle of human body limb;
The human body attitude information of described human joint points and kinematic parameter and image sequence temporal information are shone upon one by one and obtained the standard operation model.
10. the physical education householder method based on human body attitude identification as claimed in claim 7, it is characterized in that, described the described user action range image sequence of predetermined point of time or time period is compared with the standard operation model of corresponding time point or time period, the difference of obtaining user action and standard operation model comprises:
Calculating every framed user in predetermined point of time or time period moves the volume coordinate of human joint points of depth image and forms human body attitude information;
Calculate the kinematic parameter of human joint points according to the human body attitude information of continuous multiple frames user action depth image; Wherein, described kinematic parameter comprises articulation point movement velocity that the displacement according to time interval of consecutive frame and corresponding articulation point calculates and the rotational angle of human body limb;
The human body attitude information of described human joint points and kinematic parameter are compared and obtain difference with the standard operation model of corresponding time point or time period.
11. the physical education householder method based on human body attitude identification as claimed in claim 7 is characterized in that described predetermined point of time is the time point of crucial posture, described predetermined amount of time is the residing time period of key operations.
12. the physical education householder method based on human body attitude identification as claimed in claim 7, is characterized in that, described action is corrected and is prompted for voice suggestion or picture cues.
CN2012101385036A 2012-05-07 2012-05-07 Physical education assisting system and method based on human body posture recognition Pending CN103390174A (en)

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